Hi All, First things first, I am not a coin collector (even though my dad tried to get me into it!) My elderly father-in-law, however, has quite a collection of silver and is understandably curious to know if he is sitting on highly sought after pieces or just shiney objects from around the world, so i'm helping him out. The problem is, alot of his items, although look like coins, are not coins at all. Commemorative medals? Ingots? I have no idea even if they are considered "collectables" at all. (I wont waste your time with those, although if anyone can point me to a more appropriate forum, it would be appreciuated) I have uploaded a handful of photos here So, I have a few questions that I hope you would be able to help me with... How do you define a "coin"? How do you define a "british coin"? (e.g. is Gibralter "British") How would we be able to tell if a "silver" coin is actually a fake? Is there an "idiots guide" to grading? Many thanks for your help. Rob